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This Concept Map, created with IHMC CmapTools, has information related to: Evaluation of Research, Experimenter Bias can be prevented by Double-Blind Procedure, Methodological Problems include Sampling Bias, Methodological Problems include Placebo Effect, Methodological Problems include Distortions in Self-Report Data, Sampling Bias occurs when Sample, Sampling Bias addressed through random sampling, Distortions in Self-Report Data include response set, Evaluation of Research may include identification of Methodological Problems, Sampling Bias addressed through Stratified Sampling, Placebo Effect based on Participant Expectations, Methodological Problems include Experimenter Bias, Evaluation of Research may include Replication, Sample is not representative of Population, Distortions in Self-Report Data include social desirability bias, Evaluation of Research may include Meta-analysis